Hello @cryptoreforma,
Thanks for your feedback :)
It obvious that I didn't use the flashgun the best way, it lit the floor and I agree it really unaesthetic.
Concerning colors : I usually use complementary colors. For that picture, I would use light-blue. But I had no extra tripod nor extra flashgun to put a colored gel on it and make a light-blue backlight. Next time I'll manage to fix that for sure.
Usually I'm not a big fan of B&W in lightpainting but it gives something different to the picture and I works for sure.
🙏